麻省理工电路和电子学讲义5英文版
08-01
The Digital Abstraction
zDiscretize value 0, 1
Combinational gate abstraction
For example:a digital circuit
!!
How to build a digital gate
Analogy
) s e C
How to build a digital gate
C
Electrical Analogy
Electrical Analogy
equivalent ckt
Consider
What about?
can also build compound gates
The MOSFET Device
Metal-Oxide Semiconductor
The MOSFET Device
t u o k c k e Understand its operation by viewing itas a two-port element —
i DS on
on a scope.v DS
B
Example
v OUT
E.g.:
Does our inverter satisfy the staticdiscipline for these thresholds:
Switch resistor (SR) modelof MOSFET
…more accurate MOS model
R ON
=5K Ω
SR Model of MOSFET
Using the SR model